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General DescriptionThe MAX323/MAX324/MAX325 are precision, dual, SPST analog switches. They are single-supply devices designed to operate from +2.7V to +16V. The MAX323 has two normally open (NO) switches, and the MAX324 has two normally closed (NC) switches. The MAX325 has one NO and one NC switch. Low power consumption (5μW) makes these parts ideal for battery-powered equipment. These switches offer low leakage currents (100pA max) and fast switching speeds (tON = 150ns max, tOFF = 100ns max).When powered from a 5V supply, the MAX323 series offers 2Ω max matching between channels, 60Ω max on-resistance, and 6Ω max RON flatness.These switches also offer 5pC max charge injection, and a minimum of 2000V ESD per Method 3015.7.For equivalent devices specified for dual-supply opera-tion, see the MAX320/MAX321/MAX322 data sheet. For quad versions of the MAX320 series, see MAX391/MAX392/MAX393 data sheet.
Applications Battery-Operated Systems Heads-Up Displays Audio and Video Switching Test Equipment +3V, +5V DACs and ADCs
Sample-and-Hold Circuits Guidance and Control Systems Military Radios Communications Systems PBX, PABX
Features Low On-Resistance (RON), 60Ω max (33Ω typ) RON Matching Between Channels <2Ω RON Flatness <6Ω Max Guaranteed Charge Injection <5pC Single-Supply Operation (+2.7V to +16V) Low Power Consumption, <5μW Low Leakage Current Over Temperature,
<2.5nA at +85°C Fast Switching: tON <150ns, tOFF <100ns Guaranteed Break-Before-Make (MAX325 only) TTL/CMOS Logic Compatible
19-0347; Rev 2; 12/20
Ordering Information continued at end of data sheet.* Contact factory for dice specifications.** Contact factory for availability.
PART TEMP. RANGE PIN-PACKAGEMAX323CPA 0°C to +70°C 8 Plastic DIPMAX323CUA 0°C to +70°C 8 µMAXMAX323CSA 0°C to +70°C 8 SOMAX323C/D 0°C to +70°C Dice*MAX323EPA -40°C to +85°C 8 Plastic DIPMAX323ESA -40°C to +85°C 8 SOMAX323EJA -40°C to +85°C 8 CERDIP**MAX323MJA -55°C to +125°C 8 CERDIP**
Voltage Referenced to GND V+ ......................................................................-0.3V to +17V IN_, COM_, NC_, NO_ (Note 1) ..............-0.3V to (V+ + 0.3V)
Continuous Current (any terminal) .....................................30mAPeak Current, COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle max) ..........................100mAESD per Method 3015.7 ..................................................>2000VContinuous Power Dissipation
Operating Temperature Ranges MAX32_C_ _ ......................................................0°C to +70°C MAX32_E_ _ .................................................. -40°C to +85°C MAX32_MJA ................................................. -55°C to +125°C
Storage Temperature Range ............................ -65°C to +150°CLead Temperature (soldering, 10sec) .............................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP(Note 2) MAX UNITS
ANALOG SWITCH
Analog Signal RangeVCOM,
VNO, VNC(Note 3) 0 V+ V
On-Resistance RON
V+ = 4.5V, ICOM = 1.0mA,VNO or VNC = 3.5V
TA = +25°C 33 60Ω
TA = TMIN to TMAX 75
On-Resistance Match Between Channels (Note 4) ΔRON
V+ = 5V,ICOM = 1.0mA, VNO or VNC = 3V
TA = +25°C 0.8 2Ω
TA = TMIN to TMAX 4
On-Resistance Flatness (Notes 3, 5)
RFLAT(ON)
V+ = 5V,ICOM = 1.0mA,VNO or VNC = 1V, 2V, 3V
TA = +25°C 2 6Ω
TA = TMIN to TMAX 8
NO or NC Off Leakage Current (Note 6)
INO(OFF)or
INC(OFF)
V+ = 5.5V, VCOM = 1V,VNO or VNC = 4.5V
TA = +25°C -0.1 0.01 0.1nATA = TMIN
to TMAX
C, E -5 5M -40 40
COM Off Leakage Current (Note 6)
ICOM(OFF)
V+ = 5.5V, VCOM = 4.5V, VNO or VNC = 1V
TA = +25°C -0.1 0.1nATA = TMIN
to TMAX
C, E -5 5M -40 40
COM On Leakage Current (Note 6)
ICOM(ON)
V+ = 5.5V, VCOM = 5V, or VNO or VNC = 5V
TA = +25°C -0.2 0.2nATA = TMIN
to TMAX
C, E -10 10M -50 50
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MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
Note 1: Signals on NC, NO, COM, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum current rating.
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Off Isolation (Note 7) OIRR RL = 50Ω, CL = 5pF,f = 1MHz, Figure 5 TA = +25°C 72 dB
Crosstalk (Note 8) RL = 50Ω, CL = 5pF,f = 1MHz, Figure 6 TA = +25°C 85 dB
NC or NO Capacitance COFF f = 1MHz, Figure 7 TA = +25°C 9 pFCOM Off Capacitance CCOM(OFF) f = 1MHz, Figure 7 TA = +25°C 9 pFCOM On Capacitance CCOM(ON) f = 1MHz, Figure 8 TA = +25°C 22 pFSUPPLYPower-Supply Range 2.7 16 V
Positive Supply Current I+ V+ = 5.5V, VIN = 0V or V+, all channels on or off -1 0.0001 1 µA
LOGIC INPUT
Input Voltage Low VINL 0.8 V
Input Voltage High VINH 2.4 V
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MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
(V+ = 3.0V to 3.6V, GND = 0V, VINH = 2.4V, VINL = 0.6V, TA = TMIN to TMAX, unless otherwise noted.)
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet.
Note 3: Guaranteed by design.Note 4: ΔRON = ΔRON max - ΔRON min.Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal range.Note 6: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25°C.Note 7: Off Isolation = 20 log10 [ VCOM ⁄ (VNC or VNO) ], VCOM = output, VNC or VNO = input to off switch.Note 8: Between any two switches.
PARAMETER SYMBOL CONDITIONS MIN TYP(Note 2) MAX UNITS
ANALOG SWITCH
Analog Signal RangeVCOM,
VNO, VNC(Note 3) 0 V+ V
Channel On-Resistance RON
V+ = 3V,ICOM = 1.0mA, VNO or VNC = 1.5V
TA = +25°C 83 175Ω
TA = TMIN to TMAX 275
DYNAMIC
Turn-On Time (Note 3) tON VNO or VNC = 1.5VTA = +25°C 160 400
nsTA = TMIN to TMAX 500
Turn-Off Time (Note 3) tOFF VNO or VNC = 1.5VTA = +25°C 40 125
Applications InformationLogic LevelsThe MAX323/MAX324/MAX325 are TTL compatible when powered from a single +5V supply. When powered from other supply voltages, TTL compatibility is not guaranteed, and the logic inputs should be driven from rail to rail. For example, with a 15V supply, IN1 and IN2 should be driven low to 0V and high to 15V. Similarly, with a 3.3V supply, IN1 and IN2 should be driven low to 0V and high to 3.3V.Driving IN1 and IN2 rail-to-rail minimizes power consumption.
Analog Signal LevelsAnalog signals that range over the entire supply voltage (V+ to GND) can be switched with very little change in on-resistance over the entire voltage range (see Typical Operating Characteristics). All the switches are bidirec-tional, so NO_, NC_, and COM_ pins can be used as either inputs or outputs.
Power-Supply Sequencing and Overvoltage ProtectionDo not exceed the absolute maximum ratings, because stresses beyond the listed ratings may cause permanent damage to the devices.Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals or logic inputs, especially if the analog or logic
signals are not current-limited. If this sequencing is not possible, and if the analog or logic inputs are not current-limited to <30mA, add a small-signal diode (D1) as shown in Figure 1. If the analog signal can dip below GND, add D2. Adding protection diodes reduces the analog signal range to a diode-drop (about 0.7V) below V+ (for D1), and to a diode-drop above ground (for D2). Leakage is unaf-fected by adding the diodes. On-resistance increases by a small amount at low supply voltages. Maximum supply voltage (V+) must not exceed 17V.Adding protection diodes causes the logic thresholds to be shifted relative to the power-supply rails. This can be significant when low supply voltages (5V or less) are used. With a 5V supply, TTL compatibility is not guaran-teed when protection diodes are added. Driving IN1 and IN2 all the way to the supply rails (i.e., to a diodedrop higher than the V+ pin, or to a diode-drop lower than the GND pin) is always acceptable.Protection diodes D1 and D2 also protect against some overvoltage situations. With Figure 1’s circuit, if the sup-ply voltage is below the absolute maximum rating, and if a fault voltage up to the absolute maximum rating is applied to an analog signal pin, no damage will result. For example, with a +5V supply, analog signals up to ±8V will not damage the circuit of Figure 1. If only a single fault signal is present, the fault voltage can rise to +17V or to -12V without damage occurring.
Figure 1. Overvoltage Protection Using Two External Blocking Diodes
PIN NAME FUNCTION
1NO1 Normally Open Analog Switch Terminal
(MAX323/MAX325)
NC1 Normally Closed Analog Switch Terminal (MAX324 only)
2, 6 COM1, COM2 Analog Switch Common Terminal
3, 7 IN2, IN1 Logic Inputs4 GND Ground
5NO2 Normally Open Analog Switch Terminal
(MAX323 only)
NC2 Normally Closed Analog Switch Terminal (MAX324/MAX325)
8 V+ Positive Supply
www.analog.com Analog Devices 6
MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
* Contact factory for dice specifications.** Contact factory for availability.
PART TEMP. RANGE PIN-PACKAGEMAX324CPA 0°C to +70°C 8 Plastic DIPMAX324CUA 0°C to +70°C 8 µMAXMAX324CSA 0°C to +70°C 8 SOMAX324C/D 0°C to +70°C Dice*MAX324EPA -40°C to +85°C 8 Plastic DIPMAX324ESA -40°C to +85°C 8 SOMAX324EJA -40°C to +85°C 8 CERDIP**MAX324MJA -55°C to +125°C 8 CERDIP**MAX325CPA 0°C to +70°C 8 Plastic DIPMAX325CUA 0°C to +70°C 8 µMAXMAX325CSA 0°C to +70°C 8 SOMAX325C/D 0°C to +70°C Dice*MAX325EPA -40°C to +85°C 8 Plastic DIPMAX325ESA -40°C to +85°C 8 SOMAX325EJA -40°C to +85°C 8 CERDIP**MAX325MJA -55°C to +125°C 8 CERDIP**
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MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
Package InformationFor the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
Package Information (continued)For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
Package Information (continued)For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
2 12/20 Updated Pin Configurations in Pin Configurations/Functional Diagrams/Truth Tables, added Revision History. 1, 13
MAX323/MAX324/MAX325 Precision, Single-Supply,SPST Analog Switches
Revision History
w w w . a n a l o g . c o m Analog Devices 13
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